Is and Is not

[Sharp & Fiery]

I doubt everyone one here will ever all agree on anything.

I disagree.

 

[DocJD]

A fine point. But then are they still a knife or a toy with a sharp edge?

"Therapy devise" ... but still technically a knife !

 

[DocJD]

you hold in your hand as a tool.

Or , optionally attach to your rifle as a weapon (bayonet ) .

Or throw for sport ...or in a fight .

 

[DocJD]

A toy car

I'll bet you could make a functional car body out of enough legos ?

 

[K.O.D.]

Please, for the love of God, no one ask if a bowl of cereal is a soup or not!

"A bowl is most useful when it is empty." Lao Tzu

 

[DocJD]

Well, no wonder the Britannics lost the Revolutionary War - they got it all wrong again.

But for the sake of argument, "simple machine" is not the same as "machine" - which was the topic of discussion above.

A manual tool such as a knife of the type we are discussing here has never been referred to by anyone I have encountered in the past five decades as a "machine" - which requires an external power source for movable parts.

Common usage does largely define language . But ignorance does not alter facts .

Machines , simple and otherwise , existed long before "external power sources " beyond human , animal , water or wind etc .

Simple machines form the basis for more complex machines .

An electric powered knife , still has a simple knife blade to do the cutting .

 

[DocJD]

a machine does a task.

Maybe you mean a robot / computer controlled machine ? Automaton

Most complex machines require an operator and are still tools . Even the above require human supervision .

 

[DangerZone98]

Me knife cutty cutty and pokey pokey. Me Grimlock happy.

 

[Old Biker]

I started my working carrier in a furniture factory. Most of the time a had a knife in my pocket and another on my belt. Many of the machines I worked on and around use multiple knives to shape the parts. Those knives were ground razor sharp when we started a job. So yes knives can be a machine, or a major portion of a machine. And defiantly something one did not want to be careless around when setting up, or operating the machine.

O.B.

 

[elasmonut]

A knife is one of humanities oldest and simplest tools. A hard abrasion resistant wedge tool that can seperate materials. The simple incilned plane that can focus mechanical force on a edge or tip, to pierce,cut, seperate, scrape, or split.
With a knife you can create or destroy, save a life or take one, but it has no power save the hand that weilds it. Most people would find it hard to eat or prepare food without some kind of knife.

 

[Kryme]

Is mayonnaise a knife?

https://imgur.com/mrGYTbo

 

[SimplyMinded]

A hard abrasion resistant wedge tool

Teeth are tools?

 

[SimplyMinded]

A hard abrasion resistant wedge tool that can seperate materials. The simple incilned plane that can focus mechanical force on a edge or tip, to pierce,cut, seperate, scrape, or split.

Teeth

 

[elasmonut]

Teeth are tools?

Absolutely! I prefer to refer to mine as "integrated , dentine based bio-shears"

 

[awesome14]

A knife is a force multiplier. It transmits the force placed on the handle to a much smaller surface area, in some cases by a factor of a million, and all the force on the handle is concentrated on the edge, causing it to cut easily. If a knife was 2 handles, it would suck, because no force multiplication.The knife in some form is the oldest and most ubiquious tool besides a rock.

 

[gooeytek]

I've used a plastic knife to cut cake many times. I've even used a toy dagger to cut cake. People are overthinking this.

 

[stabman]

Knife is always a knife.
That's as much thinking as I'm gonna put into it.

 

[hhmoore]

*wrong thread - forget I was here*

 

[eveled]

I've used a plastic knife to cut cake many times. I've even used a toy dagger to cut cake. People are overthinking this.

I often cut food on my plate with my fork. Does that mean my fork is a knife?

 

[jmh33]

I often cut food on my plate with my fork. Does that mean my fork is a knife?

Spork!!
John